zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/mtd/maps/autcpu12-nvram.c b/ap/os/linux/linux-3.4.x/drivers/mtd/maps/autcpu12-nvram.c
new file mode 100644
index 0000000..0598d52
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/mtd/maps/autcpu12-nvram.c
@@ -0,0 +1,128 @@
+/*
+ * NV-RAM memory access on autcpu12
+ * (C) 2002 Thomas Gleixner (gleixner@autronix.de)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/sizes.h>
+#include <mach/hardware.h>
+#include <mach/autcpu12.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+
+static struct mtd_info *sram_mtd;
+
+struct map_info autcpu12_sram_map = {
+ .name = "SRAM",
+ .size = 32768,
+ .bankwidth = 4,
+ .phys = 0x12000000,
+};
+
+static int __init init_autcpu12_sram (void)
+{
+ map_word tmp, save0, save1;
+ int err;
+
+ autcpu12_sram_map.virt = ioremap(0x12000000, SZ_128K);
+ if (!autcpu12_sram_map.virt) {
+ printk("Failed to ioremap autcpu12 NV-RAM space\n");
+ err = -EIO;
+ goto out;
+ }
+ simple_map_init(&autcpu12_sram_map);
+
+ /*
+ * Check for 32K/128K
+ * read ofs 0
+ * read ofs 0x10000
+ * Write complement to ofs 0x100000
+ * Read and check result on ofs 0x0
+ * Restore contents
+ */
+ save0 = map_read(&autcpu12_sram_map, 0);
+ save1 = map_read(&autcpu12_sram_map, 0x10000);
+ tmp.x[0] = ~save0.x[0];
+ map_write(&autcpu12_sram_map, tmp, 0x10000);
+ /* if we find this pattern on 0x0, we have 32K size
+ * restore contents and exit
+ */
+ tmp = map_read(&autcpu12_sram_map, 0);
+ if (!map_word_equal(&autcpu12_sram_map, tmp, save0)) {
+ map_write(&autcpu12_sram_map, save0, 0x0);
+ goto map;
+ }
+ /* We have a 128K found, restore 0x10000 and set size
+ * to 128K
+ */
+ map_write(&autcpu12_sram_map, save1, 0x10000);
+ autcpu12_sram_map.size = SZ_128K;
+
+map:
+ sram_mtd = do_map_probe("map_ram", &autcpu12_sram_map);
+ if (!sram_mtd) {
+ printk("NV-RAM probe failed\n");
+ err = -ENXIO;
+ goto out_ioremap;
+ }
+
+ sram_mtd->owner = THIS_MODULE;
+ sram_mtd->erasesize = 16;
+
+ if (mtd_device_register(sram_mtd, NULL, 0)) {
+ printk("NV-RAM device addition failed\n");
+ err = -ENOMEM;
+ goto out_probe;
+ }
+
+ printk("NV-RAM device size %ldKiB registered on AUTCPU12\n",autcpu12_sram_map.size/SZ_1K);
+
+ return 0;
+
+out_probe:
+ map_destroy(sram_mtd);
+ sram_mtd = 0;
+
+out_ioremap:
+ iounmap((void *)autcpu12_sram_map.virt);
+out:
+ return err;
+}
+
+static void __exit cleanup_autcpu12_maps(void)
+{
+ if (sram_mtd) {
+ mtd_device_unregister(sram_mtd);
+ map_destroy(sram_mtd);
+ iounmap((void *)autcpu12_sram_map.virt);
+ }
+}
+
+module_init(init_autcpu12_sram);
+module_exit(cleanup_autcpu12_maps);
+
+MODULE_AUTHOR("Thomas Gleixner");
+MODULE_DESCRIPTION("autcpu12 NV-RAM map driver");
+MODULE_LICENSE("GPL");